CN-122026666-A - Underwater motor with two-stage planetary reduction system and underwater propeller

CN122026666ACN 122026666 ACN122026666 ACN 122026666ACN-122026666-A

Abstract

The application relates to the technical field of underwater motors, and provides an underwater motor with a two-stage planetary reduction system and an underwater propeller, wherein the underwater motor with the two-stage planetary reduction system comprises a driving part, a driving part and a driving part, wherein the driving part is provided with a motor cavity, an external conical surface and at least one accommodating cavity; the double-stage planetary speed reducer comprises a motor cavity, a double-stage planetary speed reducer, an output part and a plurality of sealing elements, wherein the double-stage planetary speed reducer is arranged on the driving part, at least one accommodating cavity is formed between the output part and the driving part in a matched mode, and the sealing elements are used for being accommodated in the accommodating cavity to isolate external water from penetrating or prevent oil in the motor cavity from exuding. The underwater motor with the two-stage planetary reduction system can solve the technical problems that in the related art, under the working condition of direct drive type low rotation speed, the output torque is insufficient, the motor shell is easy to loose after receiving axial tension in a high thrust requirement scene, and the multi-cavity sealing reliability is insufficient, so that water infiltration and oil leakage are easy to occur.

Inventors

ZHANG LI
WU MIN
LI YI
HUANG HUAQIU

Assignees

南昌三瑞智能科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260309

Claims (10)

1. An underwater motor with a dual stage planetary reduction system, comprising: the driving part is used for being connected with an external power supply to output torque and is provided with a motor cavity, an external conical surface and at least one containing cavity; The two-stage planetary reduction part is in transmission connection with the driving part and is used for receiving the torque output by the driving part and outputting the torque; The output part is arranged on the driving part and is provided with a radial threaded hole, a locking tip set screw is internally screwed in the radial threaded hole, the end part of the locking tip set screw is abutted and pressed on the external conical surface, a speed reduction accommodating space is formed by encircling the output part and the driving part, the two-stage planetary speed reduction part is arranged in the speed reduction accommodating space and is arranged on the output part, the output part is in transmission connection with the two-stage planetary speed reduction part and is used for receiving torque output by the two-stage planetary speed reduction part, at least one accommodating cavity is formed between the output part and the driving part in a matched manner, and The sealing elements are in one-to-one correspondence with the accommodating cavities and are used for being accommodated in the accommodating cavities to isolate external water from penetrating or oil liquid in the motor cavity from exuding; When the output part has an axial movement trend away from the driving part, the external conical surface applies reverse radial extrusion force to the output part through the locking tip set screw so as to increase the thread engagement friction force, thereby locking the axial movement of the output part.
2. The underwater motor with a dual stage planetary reduction system of claim 1 wherein the drive section comprises: the stator part is provided with the motor cavity and the external conical surface, at least one accommodating cavity is formed between the stator part and the output part in a matched mode, and the output part is arranged on the stator part; The rotor part is positioned in the motor cavity and is in transmission connection with the two-stage planetary reduction part; a support part arranged at one end of the stator part far away from the output part, a rotor part rotatably arranged on the support part, and The rear end cover is arranged at one end, far away from the output part, of the stator part, is used for being connected with an external power supply and driving the rotor part to rotate through the supporting part and the stator part, is provided with at least one containing cavity, a sealing space and at least one containing cavity are formed between the rear end cover and the supporting part, and at least one containing cavity is formed between the rear end cover and the stator part; the double-stage planetary reduction part is used for receiving the torque output by the rotor part, and the sealing space is used for containing sealing medium.
3. The submersible motor with a dual stage planetary reduction system of claim 2, wherein the stator portion comprises: The stator shell is provided with an external conical surface, an inner hole step side surface and a stator concave surface, the external conical surface is arranged on the outer side wall of the stator shell, which is contacted with the output part, the inner hole step is arranged on the inner wall of the stator shell, the inner hole step side surface is arranged on the inner wall of the stator shell, which is contacted with the supporting part, the stator concave surface is arranged on the outer side wall of the stator shell, which is contacted with the output part, and is far away from the supporting part compared with the external conical surface, and The stator winding is arranged on the stator shell and in interference fit with the inner hole step, and the rear end cover is used for connecting an external power supply and driving the rotor part to rotate through the supporting part and the stator winding; The stator comprises a stator shell, a stator concave surface, a rear end cover, a support part, an inner hole step side surface, an outer conical surface and an output part, wherein the output part is arranged on the stator shell, the support part is arranged on one end, far away from the output part, of the stator shell, the rear end cover is arranged on one end, far away from the output part, of the stator shell, the side surface of the inner hole step is matched with the rear end cover to form a containing cavity, the stator concave surface is matched with the output part to form the containing cavity, and the stator shell is coaxially positioned and matched with the output part through the outer conical surface; And/or the stator shell is also provided with a first stator internal thread and a second stator internal thread, and is in threaded fit and fixed with the supporting part through the first stator internal thread and the rear end cover through the second stator internal thread; And/or the stator shell is further provided with a first stator inner hole and a second stator inner hole, the first stator inner hole is used for installing a second bearing, the second stator inner hole is used for installing a second TC framework oil seal, and the second TC framework oil seal is used for isolating the motor cavity from the speed reduction accommodating space so that the motor cavity is not communicated with the speed reduction accommodating space; and/or the diameter of one end of the external conical surface close to the output part is larger than that of one end far away from the output part; And/or the stator shell, the second TC framework oil seal and the rear end cover are enclosed to form the motor cavity capable of accommodating the rotor part and the supporting part.
4. The underwater motor with a dual stage planetary reduction system as claimed in claim 3, wherein the stator winding comprises: A coil arranged on the stator housing and in interference fit with the inner hole step, and One end of the three-phase line is connected with the coil, and the other end of the three-phase line is connected with the supporting part through welding; The rear end cover is used for being connected with an external power supply to drive the rotor part to rotate through the supporting part, the three-phase line and the coil so as to output torque to the double-stage planetary reduction part.
5. The submersible motor with a dual stage planetary reduction system of claim 2, wherein the rotor section comprises: A rotating shaft rotatably arranged on the supporting part and in transmission connection with the two-stage planetary reduction part, wherein a rotating shaft cavity is naturally formed in the rotating shaft, and The magnet is arranged on the rotating shaft; the rear end cover is used for connecting an external power supply to drive the rotating shaft to rotate through the supporting part, the stator part and the magnet so as to output torque to the double-stage planetary reduction part; And/or the rotating shaft is provided with a rotor axial through hole, and the rotating shaft cavity is communicated with the motor cavity through the rotor axial through hole, so that oil in the motor cavity enters the rotating shaft cavity through the rotor axial through hole; And/or the rotating shaft is provided with a rotor external thread, and the rotating shaft is in threaded fit with the supporting part through the rotor external thread so as to enable the rotating shaft to be axially limited and fixed; and/or the rotating shaft is provided with symmetrical cutting edges, and the symmetrical cutting edges are used for vertically and tightly matching with the flat end face of a rotor flat end set screw screwed into the rotor so as to realize the circumferential rigid locking of the rotor part and the rotating shaft; and/or an external gear is arranged at one end, close to the output part, of the rotating shaft, and the rotating shaft is in transmission connection with the two-stage planetary reduction part through the external gear.
6. The underwater motor with a dual stage planetary reduction system of claim 2 wherein the rear end cap comprises: the rear cover is arranged at one end, far away from the output part, of the stator part and is provided with an end cover concave surface, an axial concave surface, an axially symmetrical round hole and a conical surface, the end cover concave surface is arranged on the outer side wall, which is in contact with the stator part, of the rear cover, and the axial concave surface is arranged on the contact surface of the rear cover and the supporting part; A locking cover arranged on the rear cover, and One end of the three-core cable is used for connecting an external power supply, the other end of the three-core cable is connected with the supporting part through welding, and the conical surface is arranged on the contact surface of the rear cover and the three-core cable; The accommodating cavity is formed between the concave surface of the end cover and the stator part in a matched manner, the accommodating cavity is formed between the axial concave surface and the supporting part in a matched manner, the sealing space is formed between the rear cover and the supporting part in a surrounding manner, the axially symmetrical round holes are communicated with the sealing space and are used for filling the sealing medium into the sealing space, and the accommodating cavity is formed between the conical surface, the locking cover and the three-core cable in a matched manner; and/or the rear cover is also provided with an end cover external thread, and the rear cover is in threaded fit fixation with the stator part through the end cover external thread; and/or, the rear cover is also provided with an end cover internal threaded hole, the end cover internal threaded hole is communicated with the motor cavity, and the end cover internal threaded hole is used for injecting oil into the motor cavity; And/or after oiling of the motor cavity is completed, screwing up the potting screw corresponding to the end cover internal threaded hole to seal the end cover internal threaded hole, and potting a groove formed between the potting screw and the end cover internal threaded hole through a potting layer to isolate the potting screw from outside water; And/or, the rear end cover further comprises a glue filling layer, wherein the glue filling layer is used for filling and sealing part of the supporting part and the three-core cable.
7. The underwater motor with a dual stage planetary reduction system of claim 2 wherein the support comprises: The bearing seat is arranged on the stator part and provided with a bearing external thread, at least one bearing threaded hole and a waist-shaped hole, and the bearing seat is in threaded fit fixation with the stator part through the bearing external thread; the bearing cover plate is provided with bearing through holes, radial through holes and cover plate surfaces which are in one-to-one correspondence with the bearing threaded holes, and is fixed with the bearing seat through bearing screws through the bearing through holes and the corresponding bearing threaded holes; The PCB board is arranged on the bearing cover plate and is provided with a first axial through hole and a second axial through hole, the accommodating cavity is formed between the PCB board and the cover plate surface in a matched mode, the accommodating cavity is formed between the PCB board and the rear end cover in a matched mode, and The lock shaft nut is arranged on the bearing seat, and the rotor part is connected with the lock shaft nut and used for realizing axial limit of the rotor part; the stator part is connected with the PCB through the waist-shaped hole, the radial through hole and the second axial through hole, and the rear end cover is connected with the PCB through the first axial through hole; And/or the bearing seat is also provided with a bearing inner hole, the bearing inner hole is used for installing a first bearing, and the lock shaft nut is arranged on the first bearing; And/or the stator part is electrically connected with the rear end cover through welding conduction, at least two welding spots are formed on two end faces of the PCB, and the welding spots can plug the first axial through hole and the second axial through hole.
8. The underwater motor with a dual-stage planetary reduction system as claimed in claim 2, wherein the dual-stage planetary reduction section includes: The first-stage planetary reduction device is positioned in the reduction accommodating space, is arranged on the output part, is in transmission connection with the rotor part, and is used for receiving the high-speed low-torque power output by the rotor part, and outputting the high-speed low-torque power output by the rotor part after first-stage rotation speed reduction and torque amplification; The second-stage planetary reduction device is positioned in the reduction accommodating space, is arranged on the output part, is respectively in transmission connection with the first-stage planetary reduction device and the output part, and is used for receiving the torque power output by the first-stage planetary reduction device, performing second-stage reduction and torque amplification on the torque power output by the first-stage planetary reduction device and outputting the torque power to the output part, and the second-stage planetary reduction device is used for performing second-stage reduction and torque amplification on the torque power output by the first-stage planetary reduction device and outputting the torque power to the output part The annular gear is positioned in the deceleration accommodating space and arranged on the output part, and the primary planetary reduction device and the secondary planetary reduction device are respectively meshed with the annular gear; and/or, the primary planetary reduction device comprises: The first-stage input planet carrier is arranged on the output part and is provided with a first-stage counter bore and at least one first-stage first through hole; The first-stage output planet carrier is provided with a first-stage threaded hole, at least one first-stage second through hole and an inner diameter pin hole which are in one-to-one correspondence with the first-stage counter bore, the first rolling pin realizes circumferential locking fixation of the first-stage output planet carrier and the second-stage planetary reduction gear through the inner diameter pin hole, and At least one primary planet having a primary third through hole concentric with at least one of the primary first through holes and at least one of the primary second through holes; The first-stage input planet carrier is fixed with the first-stage output planet carrier through the first-stage countersunk holes and corresponding first-stage threaded holes by first countersunk screws, the second rolling pin penetrates through the first-stage through hole, the third-stage through hole and the second-stage through hole to realize circumferential locking, the first-stage planet wheel can rotate around the rolling pin, and the first-stage planet wheel is meshed with the inner gear ring; and/or, the primary input planet carrier is further provided with an outer step and an inner step, the outer step is arranged on the outer side wall of the primary input planet carrier, the inner step is arranged on the inner wall of the primary input planet carrier, the outer step is used for mounting a fourth bearing, the inner step is used for mounting a third bearing, and the rotor part is rotationally connected with the primary input planet carrier through the third bearing; and/or, the two-stage planetary reduction device comprises: the second-stage input planet carrier is arranged on the output part and is provided with a second-stage countersunk hole and a second-stage first through hole; the second-stage output planet carrier is provided with a second-stage first threaded hole, a second-stage second through hole and a second-stage second threaded hole which are in one-to-one correspondence with the second-stage counter sunk holes; At least one secondary planet wheel having a secondary third through hole concentric with at least one of the secondary first through hole and the secondary second through hole, and The second-stage sun gear is provided with an axial outer diameter groove, the second-stage sun gear is embedded into an inner diameter pin hole of a first-stage output planet carrier of the first-stage planetary reduction device through a first rolling pin and the axial outer diameter groove to realize circumferential locking fixation with the first-stage output planet carrier, a rigid whole capable of synchronously rotating is formed with the first-stage output planet carrier, and the second-stage sun gear is meshed with the second-stage planet gear; The second-stage input planet carrier is fixed with the second-stage output planet carrier through the second-stage countersunk head hole and the corresponding second-stage first threaded hole through a first countersunk head screw, the second rolling pin penetrates through the second-stage first through hole, the second-stage third through hole and the second-stage second through hole to realize circumferential locking, the second-stage planet wheel can rotate around the pin, and the second-stage output planet carrier is rigidly fixed with the output part through the second countersunk head screw through the second-stage second threaded hole to realize torque transmission; And/or, the second-stage output planet carrier is further provided with a second-stage first inner hole and a second-stage second inner hole, the second-stage first inner hole is used for installing a fifth bearing, the second-stage sun gear is connected with the fifth bearing, and the second-stage second inner hole is used for forming clearance fit with the output part.
9. The underwater motor with a dual stage planetary reduction system of claim 2 wherein the output comprises: An output shaft in transmission connection with the two-stage planetary reduction part and provided with an output counter bore and an output step surface, and The speed reducer shell is provided with the radial threaded hole and an inner cavity, the speed reducer shell is surrounded with the stator part to form the speed reducer accommodating space, the speed reducer shell is arranged at one end of the stator part far away from the rear end cover, the output shaft is rotatably arranged on the speed reducer shell, and the accommodating cavity is formed between the inner cavity and the stator part in a matched mode; The two-stage planetary reduction part is arranged on the reducer shell, and the output step surface is used for forming clearance fit with the two-stage planetary reduction part; And/or, the speed reducer shell is further provided with a first shell inner hole, a second shell inner hole, a third shell inner hole and a fourth shell inner hole, wherein the first shell inner hole is used for installing a fourth bearing, an inner ring of the fourth bearing is in interference fit with the two-stage planetary speed reducer part, an outer ring of the fourth bearing is in interference fit with the first shell inner hole and is used for providing radial support on the outer side of the two-stage planetary speed reducer part, the second shell inner hole is used for installing the two-stage planetary speed reducer part, the third shell inner hole is used for installing a sixth bearing, the output shaft is rotatably arranged on the speed reducer shell through the sixth bearing, the fourth shell inner hole is used for installing a first TC framework oil seal, and the first TC framework oil seal is used for isolating the speed reduction accommodating space and external water environment.
10. An underwater propulsion device comprising an underwater motor with a dual stage planetary reduction system as claimed in any one of claims 1 to 9, said underwater propulsion device further comprising: The propeller is arranged on an output shaft of the output part of the underwater motor with the two-stage planetary reduction system and is in transmission connection with the output shaft of the output part; wherein the propeller is used for receiving the torque output by the output shaft of the output part to rotate so as to generate underwater thrust.

Description

Underwater motor with two-stage planetary reduction system and underwater propeller Technical Field The application relates to the technical field of underwater motors, in particular to an underwater motor with a two-stage planetary reduction system and an underwater propeller. Background With the rapid development of the fields of underwater resource detection, underwater engineering operation, leisure diving equipment and the like, the underwater motor serving as a core power unit of the underwater propeller needs to meet the core requirements of compact installation, high torque output and high-reliability operation under long-term deep water working conditions. At present, the existing underwater motor is mainly a direct-drive type underwater motor, which directly drives a propeller through a motor rotating shaft, although the structure is simplified, the output torque is seriously insufficient under the working condition of low rotating speed, the power and the whole machine volume of the motor are required to be greatly improved to meet the requirement of large thrust, the installation scene of miniaturization and compactness cannot be adapted, meanwhile, when the underwater propeller works, the propelling thrust generated by the propeller can apply continuous axial pulling force to the motor shell and far away from the motor main body, the problems that the shell connection is loose easily, gaps are formed on the sealing matching surfaces, faults such as motor burnout caused by external water infiltration and oil leakage pollution caused by internal insulating heat dissipation are caused, or the sealing protection redundancy of the wire outlet end and the oil injection end cannot meet the long-term deep water soaking requirement are solved, the large-scale application of the underwater motor in the long-term and deep water operation scene is severely restricted, and the core use requirement of the industry for the underwater motor with compactness, large torque and high protection reliability cannot be met. Disclosure of Invention The embodiment of the application provides an underwater motor with a two-stage planetary reduction system and an underwater propeller, which can solve the technical problems that in the related art, the output torque is insufficient under the direct-drive low-rotation-speed working condition, the motor shell is easy to loose after receiving axial tension under the condition of high thrust requirement, and the multi-cavity sealing reliability is insufficient, so that water infiltration and oil leakage are easy to occur. In a first aspect, an embodiment of the present application provides an underwater motor with a dual stage planetary reduction system, comprising: the driving part is used for being connected with an external power supply to output torque and is provided with a motor cavity, an external conical surface and at least one containing cavity; The two-stage planetary reduction part is in transmission connection with the driving part and is used for receiving the torque output by the driving part and outputting the torque; The output part is arranged on the driving part and is provided with a radial threaded hole, a locking tip set screw is internally screwed in the radial threaded hole, the end part of the locking tip set screw is abutted and pressed on the external conical surface, a speed reduction accommodating space is formed by encircling the output part and the driving part, the two-stage planetary speed reduction part is arranged in the speed reduction accommodating space and is arranged on the output part, the output part is in transmission connection with the two-stage planetary speed reduction part and is used for receiving torque output by the two-stage planetary speed reduction part, at least one accommodating cavity is formed between the output part and the driving part in a matched manner, and The sealing elements are in one-to-one correspondence with the accommodating cavities and are used for being accommodated in the accommodating cavities to isolate external water from penetrating or oil liquid in the motor cavity from exuding; When the output part has an axial movement trend away from the driving part, the external conical surface applies reverse radial extrusion force to the output part through the locking tip set screw so as to increase the thread engagement friction force, thereby locking the axial movement of the output part. The technical scheme provided by the embodiment of the application at least has the following technical effects: The driving part, the two-stage planetary reduction part and the output part form a closed loop power transmission link, the driving part outputs original power, the two-stage planetary reduction part completes speed reduction and torque increase, the output part outputs final power, the problems that the direct-drive underwater motor is insufficient in torque and cannot adapt to the requirement of large unde